Motor

Abstract

A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a stator and a rotor, which is supported by the stator such that the rotor rotates. Here, the rotor includes a rotational axis, which is supported by the stator such that the rotational axis rotates, a rotating body, which rotates together with the rotational axis, and a hub, which has a ring-shaped body and a protruding part. Here, the ring-shaped body is interposed between the rotational axis and the rotating body, and the protruding part extends an outer circumferential surface of the ring-shaped body coupled to the rotating body. Thus, the motor can improve the coupling strength between the rotational axis and the rotating body, securing the rotating rotor's stability.

1. A motor comprising:
 a stator; and 
 a rotor supported by the stator such that the rotor rotates, 
 wherein the rotor comprises: 
 a rotational axis supported by the stator such that the rotational axis rotates; 
 a rotating body configured to rotate together with the rotational axis; and 
 a hub having a ring-shaped body and a protruding part, the ring-shaped body being interposed between the rotational axis and the rotating body, the protruding part extending an outer circumferential surface of the ring-shaped body coupled to the rotating body, 
 wherein the hub has a fluid indentation that is formed in one surface thereof facing the stator and tilts towards an outer surface of the hub. 
 
     
     
       2. The motor of  claim 1 , wherein the protruding part is protruded towards the stator. 
     
     
       3. The motor of  claim 2 , wherein the rotating body comprises a supporting flange configured to support the protruding part. 
     
     
       4. The motor of  claim 1 , wherein the hub further comprises a wedge part coupled to the rotational axis. 
     
     
       5. The motor of  claim 3 , wherein the wedge part is formed along an edge of an inner circumferential surface of the hub,
 and wherein the rotational axis comprises a coupling flange shaped to correspond to the wedge part. 
 
     
     
       6. The motor of  claim 1 , wherein the fluid indentation has a triangular cross-section having one slope tilted towards the outer surface of the hub.